In this Friday, Sept. 27, 2013, photo, a tablet of flibanserin sits on a brochure for Sprout Pharmaceuticals in the company's Raleigh, N.C., headquarters on Friday, Sept. 27, 2013.  Sprout Pharmaceuticals said Wednesday, Dec. 11, 2013, it has reached an impasse with the Food and Drug Administration over its drug, flibanserin. The daily pill is designed to increase libido in women by acting on brain chemicals linked to mood and appetite. (AP Photo/Allen G. Breed)
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